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603 Area Code 🌍☎️

Area Code Profile · New Hampshire

The 603 area code is located in the state of New Hampshire and covers 97 cities, serving a total population of approximately 626,062. Major cities covered by the 603 area code include Manchester, Nashua, Concord, Dover, Rochester (which represents the most populated areas). There are a total of 752 telephone prefix exchanges in this area code, which support an estimated 7,520,000 active or assignable phone numbers. These prefix lines are operated by 53 distinct carriers, with Manchester as the primary rate center location.

Eastern Time97 Cities752 Prefixes

Reverse Phone Lookup in Manchester, New Hampshire

Unmask unknown callers, verify telemarketing reports, and view detailed owner information for any phone number beginning with area code (603).

How it works

1

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Provide any 10-digit phone number starting with the (603) area code.

2

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Our system scans public registries, carrier mappings, and spam reports.

3

Reveal Report

Access location details, line type, carrier, owner information, and safety levels.

Neighborhood Demographics

Calculated demographics and census summary estimations for area code 603.

44.4 y/oMedian Age
$74,400Median Income
$229,000Median Home Value
626,062Total Population

Telemarketer Complaints

Most recent complaints and comments for phone numbers beginning with 603.

Did you receive an unwanted call from a (603) phone number?

Help the community identify spammers by filing a comment.

(603) 733-9438May 17, 2026Telemarketer
Offered an unsolicited quote for local roofing and home energy services. They knew my area code but when I asked how they got my number, they hung up immediately.
See Details
(603) 746-9455May 16, 2026Debt Collector
Automated voice caller looking for someone named David. Keeps calling repeatedly asking to settle a debt. I have had this number for years and don't know David.
See Details
(603) 759-9472May 20, 2026Political
Pre-recorded campaign call promoting a local candidate. Did not respect my request to be placed on the Do Not Call list.
See Details

Cities in the 603 Area Code

The most populous cities in area code 603 are: Manchester (109,565), Nashua (86,494), Concord (42,695), Dover (29,987), and Rochester (29,752).

Other cities in the 603 area code include:

Keene, Derry, Portsmouth, Laconia, Claremont, Lebanon, Somersworth, Londonderry, Durham, Berlin, Hampton, Exeter, Milford, Hanover, Franklin, Hudson, South Hooksett, Suncook, Newmarket, Pinardville, Newport, Plymouth, Littleton, East Merrimack, Hooksett.

CityPopulation% in Area Code
Manchester109,565100%
Nashua86,494100%
Concord42,695100%
Dover29,987100%
Rochester29,752100%
Keene23,409100%
Derry22,015100%
Portsmouth20,779100%
Laconia15,951100%
Claremont13,355100%
Lebanon13,151100%
Somersworth11,766100%
Londonderry11,037100%
Durham10,345100%
Berlin10,051100%
Hampton9,656100%
Exeter9,242100%
Milford8,835100%
Hanover8,63699%
Franklin8,477100%

Showing top 20 of 97 cities.

What Time Zone is Area Code 603?

Eastern Time Zone

Abbreviation: ET · UTC Offset: UTC-5

The 603 area code lies within the Eastern Time Zone (ET, UTC-5).

Phone Prefixes in the 603 Area Code

752 prefixes found · 53 carriers · 147 rate centers

PrefixCarrierRate Center
(603) 200COMCAST IP PHONE, LLCNEWMARKET
(603) 202OMNIPOINT MIAMI E LICENSE, LLCCONCORD
(603) 203NEW CINGULAR WIRELESS PCS, LLC - DCMANCHESTER
(603) 204UNITED STATES CELLULAR - NHNASHUA
(603) 205OMNIPOINT MIAMI E LICENSE, LLCPORTSMOUTH
(603) 206PAETEC COMMUNICATIONS, INC. - NHMANCHESTER
(603) 207ONVOY, LLC - NHDERRY
(603) 208UNITED STATES CELLULAR - NHLYME
(603) 209UNITED STATES CELLULAR - NHKEENE
(603) 210COMCAST IP PHONE, LLCSUNCOOK
(603) 212CONSOLIDATED COMM OF NO. NEW ENGLAND-NHSALEM
(603) 213COMCAST IP PHONE, LLCMILFORD
(603) 214FREEDOM RING COMMUNICATIONS, LLCERROL
(603) 215FREEDOM RING COMMUNICATIONS, LLCBERLIN
(603) 216COMCAST IP PHONE, LLCDERRY
(603) 217BELL ATLANTIC MOBILE, INCBRISTOL
(603) 218BROADVIEW NETWORKS, INC. - NHMANCHESTER
(603) 219OMNIPOINT MIAMI E LICENSE, LLCCONCORD
(603) 221CONSOLIDATED COMM OF NO. NEW ENGLAND-NHNASHUA
(603) 222CONSOLIDATED COMM OF NO. NEW ENGLAND-NHMANCHESTER
(603) 223CONSOLIDATED COMM OF NO. NEW ENGLAND-NHCONCORD
(603) 224CONSOLIDATED COMM OF NO. NEW ENGLAND-NHCONCORD
(603) 225CONSOLIDATED COMM OF NO. NEW ENGLAND-NHCONCORD
(603) 226CONSOLIDATED COMM OF NO. NEW ENGLAND-NHCONCORD
(603) 227CONSOLIDATED COMM OF NO. NEW ENGLAND-NHCONCORD
(603) 228CONSOLIDATED COMM OF NO. NEW ENGLAND-NHCONCORD
(603) 229CONSOLIDATED COMM OF NO. NEW ENGLAND-NHCONCORD
(603) 230CONSOLIDATED COMM OF NO. NEW ENGLAND-NHCONCORD
(603) 231OMNIPOINT MIAMI E LICENSE, LLCDERRY
(603) 232COMCAST IP PHONE, LLCMANCHESTER
(603) 233OMNIPOINT MIAMI E LICENSE, LLCNASHUA
(603) 234OMNIPOINT MIAMI E LICENSE, LLCDERRY
(603) 235OMNIPOINT MIAMI E LICENSE, LLCDERRY
(603) 236CONSOLIDATED COMM OF NO. NEW ENGLAND-NHCAMPTON
(603) 237CONSOLIDATED COMM OF NO. NEW ENGLAND-NHCOLEBROOK
(603) 238PAETEC COMMUNICATIONS, INC. - NHPLYMOUTH
(603) 239CONSOLIDATED COMM OF NO. NEW ENGLAND-NHWINCHESTER
(603) 240CONSOLIDATED COMM OF NO. NEW ENGLAND-NHMANCHESTER
(603) 241NEW CINGULAR WIRELESS PCS, LLC - DCDOVER
(603) 242CONSOLIDATED COMM OF NO. NEW ENGLAND-NHTROY
(603) 243CHARTER FIBERLINK NH-CCO-LLC - NHWOODSVILLE
(603) 244COMCAST IP PHONE, LLCRAYMOND
(603) 245CONSOLIDATED COMM OF NO. NEW ENGLAND-NHPORTSMOUTH
(603) 246CONSOLIDATED COMM OF NO. NEW ENGLAND-NHWSTEWATSTN
(603) 247NEW CINGULAR WIRELESS PCS, LLC - DCDERRY
(603) 248CONSOLIDATED COMM OF NO. NEW ENGLAND-NHDOVER
(603) 249CONSOLIDATED COMM OF NO. NEW ENGLAND-NHMILFORD
(603) 250FREEDOM RING COMMUNICATIONS, LLCCENTER HBR
(603) 251PAETEC COMMUNICATIONS, INC. - NHCHARLESTN
(603) 252UNITED STATES CELLULAR - NHW LEBANON
(603) 253CONSOLIDATED COMM OF NO. NEW ENGLAND-NHCENTER HBR
(603) 254UNITED STATES CELLULAR - NHPLYMOUTH
(603) 255CSC WIRELESS, LLCMANCHESTER
(603) 256CONSOLIDATED COMM OF NO. NEW ENGLAND-NHWCHESTEFLD
(603) 257FREEDOM RING COMMUNICATIONS, LLCPLAISTOW
(603) 258METROPCS, INC.HOLLIS
(603) 259LEVEL 3 COMMUNICATIONS, LLC - NHLITTLETON
(603) 260COMCAST IP PHONE, LLCDERRY
(603) 261UNITED STATES CELLULAR - NHMERRIMACK
(603) 262CONSOLIDATED COMM OF NO. NEW ENGLAND-NHMERRIMACK
(603) 263PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NHMANCHESTER
(603) 264OMNIPOINT MIAMI E LICENSE, LLCMANCHESTER
(603) 265OMNIPOINT MIAMI E LICENSE, LLCNEW BOSTON
(603) 266CONSOLIDATED COMM OF NO. NEW ENGLAND-NHTILTON
(603) 267CONSOLIDATED COMM OF NO. NEW ENGLAND-NHBELMONT
(603) 268CONSOLIDATED COMM OF NO. NEW ENGLAND-NHSUNCOOK
(603) 269UNION TEL. CO.CTRBARNSTE
(603) 270MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NHSUNCOOK
(603) 271CONSOLIDATED COMM OF NO. NEW ENGLAND-NHCONCORD
(603) 272CONSOLIDATED COMM OF NO. NEW ENGLAND-NHPIERMONT
(603) 273MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NHLACONIA
(603) 274MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NHSO HAMPTON
(603) 275OMNIPOINT MIAMI E LICENSE, LLCDERRY
(603) 276BELL ATLANTIC MOBILE, INCW LEBANON
(603) 277COMCAST IP PHONE, LLCHANOVER
(603) 278BRETTON WOODS TEL. CO.BRETTON WD
(603) 279CONSOLIDATED COMM OF NO. NEW ENGLAND-NHMEREDITH
(603) 280LEVEL 3 COMMUNICATIONS, LLC - NHBARRINGTON
(603) 281CONSOLIDATED COMM OF NO. NEW ENGLAND-NHNASHUA
(603) 282MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NHCANAAN
(603) 283PAETEC COMMUNICATIONS, INC. - NHKEENE
(603) 284CONSOLIDATED COMM OF NO. NEW ENGLAND-NHCTRSANDWIH
(603) 285MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NHDOVER
(603) 286CONSOLIDATED COMM OF NO. NEW ENGLAND-NHTILTON
(603) 287LEVEL 3 COMMUNICATIONS, LLC - NHCLAREMONT
(603) 288VONAGE AMERICA LLCNASHUA
(603) 289NEW CINGULAR WIRELESS PCS, LLC - DCMANCHESTER
(603) 290UNITED STATES CELLULAR - NHCONCORD
(603) 291COMCAST IP PHONE, LLCGREENVILLE
(603) 292COMCAST IP PHONE, LLCNEWMARKET
(603) 293CONSOLIDATED COMM OF NO. NEW ENGLAND-NHLACONIA
(603) 294LEVEL 3 COMMUNICATIONS, LLC - NHPORTSMOUTH
(603) 295PAETEC COMMUNICATIONS, INC. - NHDURHAM
(603) 296CHOICE ONE OF NEW HAMPSHIRE, INC.MANCHESTER
(603) 297FREEDOM RING COMMUNICATIONS, LLCCTROSSIPEE
(603) 298CONSOLIDATED COMM OF NO. NEW ENGLAND-NHW LEBANON
(603) 299NEW CINGULAR WIRELESS PCS, LLC - DCBARTLETT
(603) 300METROPCS, INC.CHESTER
(603) 301LEVEL 3 COMMUNICATIONS, LLC - NHCTROSSIPEE
(603) 302CONSOLIDATED COMM OF NO. NEW ENGLAND-NHMANCHESTER

Showing first 100 of 752 prefixes.

Frequently Asked Questions

Where is area code 603?
Area code 603 is located in New Hampshire, covering cities including Manchester, Nashua, Concord.
What time zone is area code 603?
Area code 603 is in the Eastern Time Zone (ET, UTC-5).
What state is area code 603?
Area code 603 is in New Hampshire.